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논문 기본 정보

자료유형
학술저널
저자정보
Valerio Viti (ANSYS, Inc.) Giuliano Coppotelli (University of Rome “La Sapienza”) Federico de Pompeis (University of Rome “La Sapienza”,) Pier Marzocca (Clarkson University)
저널정보
한국항공우주학회 International Journal of Aeronautical and Space Sciences International Journal of Aeronautical and Space Sciences Volume.14 Number.1
발행연도
2013.3
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30 - 45 (16page)

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초록· 키워드

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The present work focuses on the unsteady aerodynamics and aeroelastic properties of a small-medium sized wind-turbine blade operating under ideal conditions. A tapered/twisted blade representative of commercial blades used in an experiment setup at the National Renewable Energy Laboratory is considered. The aerodynamic loads are computed using Computational Fluid Dynamics (CFD) techniques. For this purpose, FLUENT<SUP>®</SUP>, a commercial finite-volume code that solves the Navier-Stokes and the Reynolds-Averaged Navier-Stokes (RANS) equations, is used. Turbulence effects in the 2D simulations are modeled using the Wilcox k-w model for validation of the CFD approach. For the 3D aerodynamic simulations, in a first approximation, and considering that the intent is to present a methodology and workflow philosophy more than highly accurate turbulent simulations, the unsteady laminar Navier-Stokes equations were used to determine the unsteady loads acting on the blades. Five different blade pitch angles were considered and their aerodynamic performance compared. The structural dynamics of the flexible wind-turbine blade undergoing significant elastic displacements has been described by a nonlinear flap-lag-torsion slender-beam differential model. The aerodynamic quasi-steady forcing terms needed for the aeroelastic governing equations have been predicted through a strip-theory based on a simple 2D model, and the pertinent aerodynamic coefficients and the distribution over the blade span of the induced velocity derived using CFD. The resulting unsteady hub loads are achieved by a first space integration of the aeroelastic equations by applying the Galerkin’s approach and by a time integration using a harmonic balance scheme. Comparison among two- and three- dimensional computations for the unsteady aerodynamic load, the flap, lag and torsional deflections, forces and moments are presented in the paper. Results, discussions and pertinent conclusions are outlined.
#Wind turbine #aeroelasticity #aerodynamics #CFD

목차

Abstract
Nomenclature
1. Introduction
2. Computational Fluid Dynamics Model
3. Structural Dynamics Model
4. Numerical Results
5. Conclusions
Acknowledgments
References

참고문헌 (27)

참고문헌 신청
1. [단행본] - Burton, T. / 2001 / Wind Energy Handbook / John Wiley & Sons, Ltd. google schola 2. [단행본] - Manwell, J. F. / 2002 / Wind Energy Explained / John Wiley & Sons, Ltd. google schola 3. [단행본] - Eggleston, D.M. / 1987 / Wind Turbine Engineering Design / Van Nostrand Reinhold : 307 ~ google schola 4. [기타자료] - Germanischer Lloyd / 1993 / Rules and regulations, VI - Nonmarine Technology, Part 1 - Wind Energy google schola 5. [학술지(정기간행물)] - L. Librescu / 2005 / Aeroelasticity of 2-D lifting surfaces with time-delayed feedback control / Journal of Fluids and Structures 20 (2) : 197 ~ 215 google schola

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